Thinking of getting a back up camera(s) for the RV, darkroom trailer set up. The RV is 28 feet, the trailer is 14, with the hitch gap were talking 45-48 feet of length. Having 2 back up cameras, one on the RV (for use when there is no trailer) and one on the trailer. Seems like a good plan. Been watching YouTube installation vids on this unit, it seems doable. With the extra camera, the total cost would be about $450 CAD (self installation).